We free range our flock but we have an automatic coop door that works on a timer. It opens a little after daylight and closes just after sunset. It has been working fine. Earlier this week I noticed that none of the chickens were coming out to graze. I went to the coop and the rooster was guarding the automatic door which was open and the hens were all gathered in a bunch in corner. I counted them and instead of 18 there are only 12. I've seen no feathers around, only one dead chicken in the coop a couple of weeks ago with no visible sign of injury and now there are 5 more gone. Any ideas? Wouldn't a fox or a raccoon leave prints around the coop and maybe blood and feathers? Could a hawk get that many chickens? Is their reluctance to go outside maybe due to some fear of a predator? Any ideas?